John McCutchan 594c4f998a Only synchronize used Dart sources to DevFS. (#6668)
- [x] Remove the second full-sync on startup.
- [x] Always invoke the snapshotter to determine the minimal set of Dart sources used.
- [x] Only synchronize the *used* Dart sources to DevFS.
- [x] Detect syntax / file missing errors on the host and gate reloads / restarts.
2016-11-03 15:19:57 +01:00
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2016-11-02 21:14:59 -07:00